Ultraviolet lamp base



FIG. 1 is a front perspective view of our new ultraviolet lamp base with terminal pins shown here and throughout the drawings in broken lines for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevation view thereof with the right side elevation view being a mirror image thereof;

FIG. 4 is a rear elevation view thereof; and,

FIG. 5 is a front elevation view thereof. 

The ornamental design for an ultraviolet lamp base, as shown and described. 